package com.sky.service.impl;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.OrdersPaymentDTO;
import com.sky.dto.OrdersSubmitDTO;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.*;
import com.sky.service.OrderService;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderSubmitVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.List;

@Service
@Slf4j
public class OrderServiceImpl implements OrderService {
    @Autowired
    private OrdersMapper ordersMapper;
    @Autowired
    private OrderDetailMapper orderDetailMapper;
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private AddressBookMapper addressBookMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WeChatPayUtil weChatPayUtil;
    @Transactional
    public OrderSubmitVO submitOrder(OrdersSubmitDTO dto) {
        // 异常情况的处理(收货地址为空、超出配送范围、购物车为空）
            //根据地址簿id获取地址簿的信息
        AddressBook addressBook = addressBookMapper.getById(dto.getAddressBookId());
        if (addressBook == null){
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }
        Long userId = BaseContext.getCurrentId(); //获取用户id
        User user = userMapper.getById(userId);
        if (user == null){
            throw new OrderBusinessException(MessageConstant.USER_NOT_LOGIN);
        }
        ShoppingCart shoppingCart = new ShoppingCart();
        shoppingCart.setUserId(userId);
        //查询购物车
        List<ShoppingCart> CartList = shoppingCartMapper.list(shoppingCart);
        if (CartList == null || CartList.size() == 0){
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }
        // 1.构造订单数据
        Orders orders = new Orders();
        BeanUtils.copyProperties(dto,orders);
        //补充缺失的属性值
        orders.setStatus(Orders.PENDING_PAYMENT);        //订单状态
        orders.setUserId(userId);                        //下单人id
        orders.setNumber(System.currentTimeMillis()+""); //订单号
        orders.setOrderTime(LocalDateTime.now());        //下单时间
        orders.setPayStatus(Orders.UN_PAID);             //支付状态
        orders.setPhone(addressBook.getPhone());         //下单手机号
        orders.setAddress(addressBook.getDetail());      //
        orders.setConsignee(addressBook.getConsignee()); //收货人
        orders.setUserName(user.getName());              //下单人姓名
        //2.订单数据插入到orders表中
        ordersMapper.insert(orders);
        // 3. 构造订单详情数据--从购物车获取订单数据
        //订单明细数据
        List<OrderDetail> orderDetailList = new ArrayList<>();
        for (ShoppingCart cart : CartList) {
            OrderDetail orderDetail = new OrderDetail();
            BeanUtils.copyProperties(cart, orderDetail, "id");
            orderDetail.setOrderId(orders.getId());
            orderDetailList.add(orderDetail);
        }
        //4.向明细表插入n条数据
        orderDetailMapper.insertBatch(orderDetailList);
        //5.清理购物车中的数据
        shoppingCartMapper.cleanCart(userId);
        //6.封装返回结果
        return OrderSubmitVO.builder()
                .id(orders.getId())
                .orderNumber(orders.getNumber())
                .orderAmount(orders.getAmount())
                .orderTime(orders.getOrderTime())
                .build();
    }

    @Override
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
//        // 当前登录用户id
//        Long userId = BaseContext.getCurrentId();
//        User user = userMapper.getById(userId);
//
//        //调用微信支付接口，生成预支付交易单
//        JSONObject jsonObject = weChatPayUtil.pay(
//                ordersPaymentDTO.getOrderNumber(), //商户订单号
//                new BigDecimal(0.01), //支付金额，单位 元
//                "苍穹外卖订单", //商品描述
//                user.getOpenid() //微信用户的openid
//        );
//
//        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
//            throw new OrderBusinessException("该订单已支付");
//        }
//
//        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
//        vo.setPackageStr(jsonObject.getString("package"));
//
//        return vo;
        paySuccess(ordersPaymentDTO.getOrderNumber());
        return new OrderPaymentVO();
    }
     // 支付成功，修改订单状态
    public void paySuccess(String outTradeNo) {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();

        // 根据订单号查询当前用户的订单
        Orders ordersDB = ordersMapper.getByNumberAndUserId(outTradeNo, userId);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        ordersMapper.update(orders);
    }
}
